Preserve saved API region item paths

src/web/public/js/regions/type/api.js

@@ -227,7 +227,9 @@
     var sourceOptions = String(context.sourceOptions || '');
     var itemsPathValue = context.itemsPath !== undefined
       ? String(context.itemsPath === null ? '' : context.itemsPath)
-      : String(config.default_items_path || '');
+      : config.items_path !== undefined
+        ? String(config.items_path === null ? '' : config.items_path)
+        : String(config.default_items_path || '');
     var sampleDataPreview = String(context.sampleDataPreview || '');
     return '' +
       '<div class="card card-outline card-secondary admin-form-card template-field-card mb-3" data-region-id="' + region.id + '" style="position:relative;overflow:visible !important;">' +